Lock.



J. A; G11-:SEK

Loox.` APPLIGATION FILED DEC. 31, 1909. l,029,747f y Patented June 18, 1912 2 SHEETS-SHEET 2.

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To all 'whom t may evo'nc'eml: I. -K l.

JAMES A. emsnjor CHICAGO, ILLINOIS, AssIeNoR 'To mHnADAIrs a I QOMPANY, A CORPORATION or ILLINOIS.

Be it known that I, .JAMES A'.\Gmsr., a citizen ofthe United States, and resident of Chicago, county: of Cooksand State. of f Illinois, have invented certain new andfuseful Improvements in'LoclIs, of which` the fol-.- lowing 1s a specification, and which are illustrated in the accompanying drawings, forming a part thereof. 1

The invention relates to locks of thattype wherein the locki. cealed within a casing, and. is' projected to I. operative position `b contactl between the "members to be unite vbyiit.

Y. The object ofthe invention is to 'simplify and improve the construction of locks of the type described. 1

In the accompanying.,drawingstFigure 1 is a detail/side elevation of a door andits'.

jamb, showing a'lock embodying the. features ofv the invention. mounted thereon, some of the parts' being broken away to the central plane of the lock, and the door being illustrated in the 'closed position; Fig. 2

is" similar `to Fig. l1,'butshows the doorl partly opened; Fig. 3 is a detail side*eleva'- tion 'of the door and the lparts of the lock carried thereby, the Cover'. plate of the lock. Ibeing removed; and Fig. 4 is a plan seef tional view taken on the line 4 4 of ligll.V The inventionis` illustrated in. the drawcrank.' lever pivotally mounted 'upon the ingsin' connection. with' a sliding door-10,

- shown at 11..4 I

Thejmovable partsof the lock are preferably inclosedbetween coverplates, 12, 13,. adaptedv to beapplied to op osite sides of:`

orward;v edge.` These cover plates are removably conneetedt bg screwsv 14, which, as'.- shown, enter posts, 1 ,f

such "as isused upon street-'railway cars, and --the like. Thev jamb against which fthe edge of -the -dor the doorl 10, adjacent its mounted on the inner face ofthe' plate 12, throughy apertures 16 :in the plate 1 3. Une of the plates, as 12, is -provided'wit-li av dange 30, which'extendsaeross-th'e front edge of the door. The jamb.llofnthedoorg .is reeessed,as shown at19,'andcarriesaA plate 17 l which is 4provided with anv aperture V 1 8" in front of the recess. l The u'sual lmob'` spindle i20 extends" through the door and is rotatably `mounted in tbe plates' 12, Handles, as 21, 22, oa-convenient form bolt is normally con- Athe door 10 the. closed abutsv when closed is ED sTA'rns PATENT" oFFIoE.

WESTLAKE Patented June 1s, 1912.

rotating the' Aspindle 20 in pulling back wardly' upon the door, are mounted upon the ends of the spindle. A single roll-back 23 is'employed,V As shown, it is mounted on the spindle 20 between the plates-12, 13,

(andA normally rests against a stop 24;V

The boltv isdesignated bythe numeral'25; and 1s provided with a hooked, forward end 26.';l The sliankof theV bolt is slotted, as

Vshown" at 27,fto receive' the hub'28of the i rollfbaclr 23. When'the bolt 25 isfretracted, 1t is entirely 'concealed between fthe plates 1 2, 13, asv shown in Fig.. 2- ofthe drawings.

Whenadvan'c'ed, 'as shown in Fig.- 1 Aof the drawings,fitsV hooked' end `26. projects thronghan aperture 29 inthe flange 3'0 of theplate12, yto enterthe recess 19in the door )amb-1 1, and engagethe shoulder'of the aperture `18inthe plate 1.7,;for securing i l osition.

.- A springhas 31, is emp oyedior .adr/ane. j

'ingthe bolt` 25. As shown, thisspring is coiled abouta pivot post 32, mounted on the plate 12, and reactsbetween a stop 33 anda lever. 3 4. The lever 341s pivoted on thepost 32.and bears upon the bolt 25, as by engaging' a stud 35, formed on the bolt.

vA sp1-'ing latch'36 is provided for securing .the 'bolt25l in the retracted position illustrated inFig-2 o f the drawings.' As shown',

this 'sprinfg'latch takes .the form. of a bell plate 12, as at 37, and having uponthe end .of one-oit` its arms, a hook38 for engaging jamb in-closir'ig. As shown, -a plunger 39 .1i-s pivotallyronneeted-.to one A'off the arms,`

as 41,01? the latch member 136, and extends forwardlytherefrom into an aperture 42'provided in the flange 30. The forward 'end of the plunger 39 has a sliding engagement with the Walls of the aperture 42, and fitsIae is normalytlush withthe outer `vsurgtaeeoi' the flange. -When `the` door 10 approaches vthe closed position, the forward end; of the plunger 39 is engaged by an iappurtenance of the jamb 11, as a stud 43,

yformed ontlie jamb plate`17to raise the Alatch 36 and release the bolt 25. A spring v44 controls. the latch 36 and normally retains the plunger 39 in its advanced position. -This spring is most conveniently coiled aboutthe stud 33, which serves as a stop for the spring 31fand`reacts between the pivot vpost 32 andthe rear end of the plunger 39. y The roll-back 23 reacts upon the bolt 25 vthrough a lever 45, which is pivotally mounted upon the-plate 12, at 46, and bears upon'the stud 35 in opposition to the lever 34. A spring 47 bears upon the foot of the lever 45 to normally-retain the roll-back 23 and spindle 20 in a position corresponding to an upright position, of the knobs 21, 22. As shown,l this spring is coiled about a stud 48 formed on the plate 12 'and reacts upon a fixed support, as a shoulder 49, formed on the inner face of the plate 12.

A stop lug'50 is provided forlimiting the movement of the bolt 25. As s hown,this stop lug projects int'o the path of ythe bolt 25 lfrom the innerface of the'plate 12in such a position that it is vengaged by the hooked end 26 of the bolt 25. when the Bolt is in `-the retracted-position, and enters a notch 51, formed in the undersideof the bolt in front ofthe slot 27, when the bolt is advanced. The initialv pressure of the lever v45 upon the stud 35 for retracting the bolt is resisted by the stud 50, and the latter then acts as a fulcrum upon which the bolt tends to tilt: As the rearward end of the'bolt is prevented from 'downward movement by the spindle 20, the rocking action is commu' nicated to the Yforward end, raising it over t-he stud 50. "Further pressure, by means' of the lever .45, retracts the -bolt'tothe position shown in Fig. 2. Should the door-have been drawn back from the jainb when the retracting action iscommenced, so that the hook 26 of the bolt rests firmly against the shoulder of the striker plate aperture, the bolt being slightly out of contact with the stud 50, this striker plate shoulder will serve'asthe fulcrum and ,cause-the bolt to rise until it 'is freed therefrom. Should the bolt be accidentally projected while the door is open, the stud r50 will have the 4effect of causing the automatic engagement of the bolt with the striker plate shoulder by preventing the bolt from being pushed inwardly by pressure uponitsLouter end. A This action is rendered possible by the rounding or beveling of the nose of the bolt, as shown. l By ineans of this arrangement the stud 50 receives a considerable part of the strain applied to the bolt 25 by an attempt to open the door without releasing the'bolt from theV jamb plate 17. In Vthe construction shown and described, thebolt 25 is raised from engagement with vthe jamb plate 17, by pressure applied to either of the knobs 2,1, 22, for opening the' door. When the bolt has been completely withdrawn, the stud 35 is engaged by the latch 36, and the bolt is thus retained in a retracted position in which it is Vcompletelyv concealed within the casing formed by the plates 12, 13, and the flange 30, until the latch 36 is released by contact ofthe forward end of the plunger 39 with the stud 43 formed on the jamb plate 17.

If'desired, key-controlled means may be employed for preventing rotation of the spindle-20 to release the bolt 25.

As shown, thel rollback 23 is provided with a rearwardly projecting arm 52, and a stop 53 is slidingly4 mounted on the plate 12,

to be moved into and out of the path of the arm 52 in the usual Way by a'key (not shown), adapted to be entered from either side of the door through key openings 56 in the plates 12, 13 and 54.

The various parts of the lock are most conveniently Amaintained in operative relation upon the plate 12, and the studs 32, 33 and 48, by means of anintermediate cover plate 54, applied to the ends of the studs 32, 33 and 48 by screws, as 55.

I claim as my invention- 1. In a lock 4for sliding like, in combination, a casing, arjamb plate having a shoulder, aV stud projecting from the, face of the jamb plate,an oscillatable and reciprocable bolt having a hooked end carried by the casing and movable between positions in which it is concealed within the casing and in which its hooked Yend projects from the casing to engage the shoulder of the jamb plate, respectively, a projecting spring acting on the bolt, a latch for securdoors andv the ing the bolt in the retracted position, a trip engageable with the stud on the jamb plate for releasing the latch, means for oscillating and retracting the bolt, and key-controlled neans for preventing the oscillation ofthe olt.

`2. In a latch, in combination, a casing, a'

reciprocable and oscillatable hookedA bolt housed within the casing having a backwardly facing shoulder, a xed abutment carried by the casingv and engageable with the shoulder when .the bolt is advanced, A

and a retracting lever engageable with a laterally-extending arm on the bolt.v

3. In a' lock, in combination, a reciprocable hooked bolt having its inner end longitudinally slotted, an oscillatable pivot extending through the'slot, an arm projecting laterally from the bolt in the direction opL projecting in the same'direction as its hook,

a pivot extending through' the slot, an arm projecting laterally from the bolt oppositely from' the shoulder and hook, a retract-ing lever engageable with the drm, and a xed a retractng level1 engageable `with the arm, abutment engageable with the shoulder when and a key-o0ntrolled detent for preventing 10 the bolt is adlfanced. the osellationof the bolt..

5. In :L loc -n combination, a l'eoprocable and oscllatable hooked bolt, a sock- JAMES A'. GIESE' eted keeper having an inwardly directed lWitnesses: shoulder, an arm projecting laterally from EDGAR ANDREWS, the bolt oppos'tely from the hook thereof, P. G. EMERY. 

